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Add 'cat' query to `wp_get_archives()`
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// | |
// Example: | |
// $cat_ID = 12; | |
// wp_get_cat_archives('type=monthly', $cat_ID); | |
// | |
// Borrowed a lot from the following links. | |
// | |
// - http://wordpress.org/support/topic/wp_get_archives-and-conditional-tags | |
// - http://www.stemlegal.com/greenhouse/2012/setting-up-month-archives-to-only-display-custom-taxonomy-wordpress/ | |
// | |
add_filter('getarchives_where', 'custom_archives_where', 10, 2); | |
add_filter('getarchives_join', 'custom_archives_join', 10, 2); | |
function custom_archives_join($x, $r) { | |
global $wpdb; | |
$cat_ID = $r['cat']; | |
if (isset($cat_ID)) { | |
return $x . " INNER JOIN $wpdb->term_relationships ON ($wpdb->posts.ID = $wpdb->term_relationships.object_id) INNER JOIN $wpdb->term_taxonomy ON ($wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id)"; | |
} else { | |
return $x; | |
} | |
} | |
function custom_archives_where($x, $r) { | |
global $wpdb; | |
$cat_ID = $r['cat']; | |
if (isset($cat_ID)) { | |
return $x . " AND $wpdb->term_taxonomy.taxonomy = 'category' AND $wpdb->term_taxonomy.term_id IN ($cat_ID)"; | |
} else { | |
$x; | |
} | |
} | |
function wp_get_cat_archives($opts, $cat) { | |
$args = wp_parse_args($opts, array('echo' => '1')); // default echo is 1. | |
$echo = $args['echo'] != '0'; // remember the original echo flag. | |
$args['echo'] = 0; | |
$args['cat'] = $cat; | |
$archives = wp_get_archives(build_query($args)); | |
$archs = explode('</li>', $archives); | |
$links = array(); | |
foreach ($archs as $archive) { | |
$link = preg_replace("/href='([^']+)'/", "href='$1?cat={$cat}'", $archive); | |
array_push($links, $link); | |
} | |
$result = implode('</li>', $links); | |
if ($echo) { | |
echo $result; | |
} else { | |
return $result; | |
} | |
} |
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